The watcher -- A boy with an engineer's mind -- This love affair with the sky -- The spark -- Catching the tornado -- The cowboy science -- A turtle in the wild -- The toreador -- Stratford, Texas -- Manchester, South Dakota -- Doubling down -- A team of upstarts -- TWISTEX takes the gravel road -- Quinter, Kansas -- "You have my only son" -- Warnings -- Bowdle, South Dakota -- A dead end, a new chance -- Chase nirvana -- A shift in the wind -- El Reno, Oklahoma -- The dragon's tail -- The crossing -- The last ride -- How far from daylight -- Ground truth -- The signs -- Tim's legacy.

Summary:

Documents the life and achievements of late engineer and storm chaser Tim Samaras, describing his development of innovative new tools and his life-risking efforts in pursuit of scientific information that has transformed the field of meteorology.